WO2015162959A1 - 立体撮像用光学系、立体撮像装置、及び内視鏡 - Google Patents

立体撮像用光学系、立体撮像装置、及び内視鏡 Download PDF

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Publication number
WO2015162959A1
WO2015162959A1 PCT/JP2015/052263 JP2015052263W WO2015162959A1 WO 2015162959 A1 WO2015162959 A1 WO 2015162959A1 JP 2015052263 W JP2015052263 W JP 2015052263W WO 2015162959 A1 WO2015162959 A1 WO 2015162959A1
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group
optical system
stereoscopic imaging
central axis
front group
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PCT/JP2015/052263
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English (en)
French (fr)
Japanese (ja)
Inventor
研野　孝吉
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オリンパス株式会社
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Priority to DE112015001381.4T priority Critical patent/DE112015001381B4/de
Priority to CN201580020494.2A priority patent/CN106233182B/zh
Publication of WO2015162959A1 publication Critical patent/WO2015162959A1/ja
Priority to US15/250,344 priority patent/US20160370571A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details
    • G02B23/2415—Stereoscopic endoscopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00064—Constructional details of the endoscope body
    • A61B1/00071—Insertion part of the endoscope body
    • A61B1/0008—Insertion part of the endoscope body characterised by distal tip features
    • A61B1/00096—Optical elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163—Optical arrangements
    • A61B1/00193—Optical arrangements adapted for stereoscopic vision
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/20—Image signal generators
    • H04N13/204—Image signal generators using stereoscopic image cameras
    • H04N13/207—Image signal generators using stereoscopic image cameras using a single 2D image sensor
    • H04N13/218—Image signal generators using stereoscopic image cameras using a single 2D image sensor using spatial multiplexing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details
    • G02B23/2423—Optical details of the distal end
    • G02B23/243—Objectives for endoscopes

Definitions

  • the present invention relates to a stereoscopic imaging optical system, a stereoscopic imaging apparatus, and an endoscope.
  • Patent Documents 1 to 4 Conventionally, a method has been disclosed in which two images with different parallax are imaged on a substantially identical plane for stereoscopic viewing (see Patent Documents 1 to 4).
  • JP-A-8-122665 Japanese Patent No. 42488771 Japanese Patent No. 4093503 JP 2001-147382 A
  • Patent Documents 1 to 3 are configured by an optical system in which the object side has two optical axes and the image side has one optical axis. Moreover, the technique described in Patent Document 4 is configured with two optical axes from an object to an image. Neither of these technologies can cope with the recent high resolution.
  • the present invention has been made in view of the above-described circumstances, and is an optical system for stereoscopic imaging, a stereoscopic imaging apparatus, and an endoscope capable of obtaining a small and high-resolution stereoscopic image with a wide viewing angle of view.
  • the purpose is to provide.
  • An optical system for stereoscopic imaging A front group having a first front group centered on a first front group center axis and a second front group centered on a second front group center axis parallel to the first front group center axis; A rear group centered on a single rear group central axis parallel to the first front group central axis and the second front group central axis; In order from the object side to the image plane side, The rear group is A rear group on the object side, 2 rear groups on the image side, A first opening centered on a first opening center deflected with respect to the rear group central axis between the first rear group and the second rear group; A second opening that is orthogonal to the plane that includes the first front group central axis and the second front group central axis and that is symmetrical with respect to the plane that includes the rear group central axis.
  • the second central principal ray of the second light beam that has passed through the second front group is separated from the rear group central axis of each of the rear group, the second aperture center, the second deflection group, and the rear group.
  • the image plane is reached after passing through the position.
  • the first opening and the first deflection group are disposed adjacent to each other;
  • the second opening and the second deflection group are disposed adjacent to each other.
  • the first deflection group and the second deflection group are from optical elements that increase in thickness in the rear group central axis direction as they are separated from the rear group central axis. Become.
  • the optical element has a wedge prism shape.
  • the first front group and the second front group are composed of concave lenses having the same shape and arranged in parallel.
  • the concave lenses arranged in parallel are integrally formed.
  • the stereoscopic imaging optical system according to an embodiment of the present invention satisfies the following conditional expression (1).
  • fl is the total length of the optical system
  • d is the maximum outer diameter of the optical system, It is.
  • the distance between the first front group central axis and the second front group central axis is 1.2 mm or less.
  • a stereoscopic imaging apparatus is The stereoscopic imaging optical system; An image sensor; It is characterized by providing.
  • a stereoscopic imaging apparatus includes a lenticular lens disposed on the object side of the imaging element.
  • An endoscope according to an embodiment of the present invention includes the stereoscopic imaging device.
  • the optical system for stereoscopic imaging, the stereoscopic imaging apparatus, and the endoscope according to the embodiment of the present invention it is possible to obtain a stereoscopic image that is small and has a high resolution and a wide viewing angle.
  • FIG. 3 is a cross-sectional view of a surface including a first front group central axis and a second front group central axis of the stereoscopic imaging optical system of Example 1.
  • FIG. 3 is a cross-sectional view of a surface including a rear group central axis that is orthogonal to a plane including a first front group central axis and a second front group central axis of the stereoscopic imaging optical system according to Example 1;
  • 2 is a lateral aberration diagram of the stereoscopic imaging optical system of Example 1.
  • FIG. 2 is a lateral aberration diagram of the stereoscopic imaging optical system of Example 1.
  • FIG. 6 is a cross-sectional view of a surface including a first front group central axis and a second front group central axis of a stereoscopic imaging optical system according to Example 2.
  • FIG. 6 is a cross-sectional view of a surface including a rear group center axis that is orthogonal to a surface including a first front group center axis and a second front group center axis of the stereoscopic imaging optical system of Example 2.
  • 6 is a lateral aberration diagram of the stereoscopic imaging optical system of Example 2.
  • FIG. 6 is a lateral aberration diagram of the stereoscopic imaging optical system of Example 2.
  • FIG. 6 is a cross-sectional view of a surface including a first front group central axis and a second front group central axis of a stereoscopic imaging optical system according to Example 3.
  • FIG. 10 is a cross-sectional view of a surface including a rear group center axis that is orthogonal to a surface including a first front group center axis and a second front group center axis of the stereoscopic imaging optical system of Example 3.
  • 6 is a lateral aberration diagram of the stereoscopic imaging optical system of Example 3.
  • FIG. 6 is a lateral aberration diagram of the stereoscopic imaging optical system of Example 3.
  • the stereoscopic imaging optical system 1 of the present embodiment will be described.
  • FIG. 1 is a cross-sectional view taken along the central axis C of a stereoscopic imaging optical system 1 according to an embodiment of the present invention.
  • the stereoscopic imaging optical system 1 of the present embodiment is centered on a first front group center axis Cf1 centered on a first front group center axis Cf1 and a second front group center axis Cf2 parallel to the first front group center axis Cf1.
  • a front group Gf having a second front group Gf2, a rear group Gb centered on a first rear group center axis Cb parallel to the first front group center axis Cf1 and the second front group center axis Cf2, Are arranged in order from the object side to the image plane I side, and the rear group Gb has a rear group center between the rear group 1 Gb1 of the object side, the rear group 2 Gb2 of the image side, and the rear group 1 Gb1 and the rear group 2 Gb2.
  • the first opening S1 centering on the first opening center CS1 deflected with respect to the axis Cb and the plane including the first front group center axis Cf1 and the second front group center axis Cf2 are orthogonal to each other, and the rear group center axis Cb is A second opening S2 centered on a second opening center CS2 that is arranged symmetrically with respect to the first opening center CS1, and a rear surface
  • the first deflection group Gv1 disposed between the group Gb1 and the rear second group Gb2, and a plane perpendicular to the plane including the first front group center axis Cf1 and the second front group center axis Cf2 and including the rear group center axis Cb
  • the first deflection group Gv1 has a second deflection group Gv2 arranged in plane symmetry, and the first central principal ray Lc1 of the first light beam L1 that has passed through the first front group Gf1 is Passes a position separated from the rear group
  • the second central principal ray Lc2 of the second light flux L2 passes through positions separated from the rear first group Gb1, the second aperture center CS2, the second deflection group Gv2, and the rear group central axis Cb of the rear second group Gb2. To the image plane I.
  • the first opening center CS1 may be included on the extension line of the first front group center axis Cf1
  • the second opening center CS2 may be included on the extension line of the second front group center axis Cf2.
  • the stereoscopic imaging optical system 1 of the present embodiment forms the first front group central axis Cf1 and the second front group by forming the rear first group Gb1 and the rear second group Gb2 rotationally symmetrically about a single rear group central axis Cb. It becomes possible to make the group center axis Cf2 approach.
  • the first central principal ray Lc1 of the first light beam L1 that has passed through the first front group Gf1 is the rear group center of the rear first group Gb1, the first aperture center CS1, the first deflection group Gv1, and the rear second group Gb2.
  • the second central principal ray Lc2 of the second light beam L2 that passes through the position separated from the axis Cb and reaches the image plane I and passes through the second front group Gf2 is the rear first group Gb1, the second aperture center CS2, and the like. Since the second deflection group Gv2 and the rear second group Gb2 pass through a position separated from the rear group central axis Cb and reach the image plane I, the aberration generated when the rear first group Gb1 passes through the rear second group Gb2 It becomes possible to correct with.
  • the first opening S1 and the first deflection group Gv1 are disposed adjacent to each other, and the second opening S2 and the second deflection group Gv2 are disposed adjacent to each other. .
  • the effective diameter of the first deflection group Gv1 and the second deflection group Gv2 are set. It can be made smaller.
  • the distance between the first opening S1 and the second opening S2 arranged in parallel can be shortened, and a small rear group Gb can be formed together with the rear first group Gb1 and the rear second group Gb2. It becomes.
  • FIG. 2 is a diagram showing an example in which the deflection group Gv of the stereoscopic imaging optical system 1 according to the embodiment of the present invention is a wedge prism.
  • FIG. 3 is a diagram showing another example in which the deflection group Gv of the stereoscopic imaging optical system 1 according to the embodiment of the present invention is a wedge prism.
  • the first deflection group Gv1 and the second deflection group Gv2 are optical elements Lv1 and Lv2 that increase in thickness in the direction of the rear group center axis Cb as they are separated from the rear group center axis Cb. Become.
  • the first light beam L1 and the second light beam L2 can be configured to pass around the rear group central axis Cb of the rear second group Gb2, and the aberration correction capability of the rear second group Gb2 can be improved.
  • the optical elements Lv1 and Lv2 may be formed separately as the first optical element Lv1 and the second optical element Lv2.
  • the optical elements Lv1 and Lv2 are wedge prism shapes.
  • both surfaces can be formed as a flat surface and can be easily processed.
  • the first front group Gf1 and the second front group Gf2 are composed of concave lenses having the same shape and arranged in parallel.
  • the first front group Gf1 and the second front group Gf2 have a lens in which the object side surface is formed as a flat surface or a convex surface on the object side, and the image side surface is formed as a strong concave surface. It is possible to reduce the occurrence of various image distortions.
  • the concave lenses arranged in parallel are integrally formed.
  • the optical axis interval can be narrowed, and the three-dimensional imaging optical system 1 can be further reduced in size.
  • the stereoscopic imaging optical system 1 satisfies the following conditional expression (1).
  • fl is the total length of the optical system
  • d is the maximum outer diameter of the optical system, It is.
  • conditional expression (1) If the lower limit of conditional expression (1) is surpassed, the maximum outer diameter of the stereoscopic imaging optical system 1 becomes large, resulting in an increase in size. If the upper limit of conditional expression (1) is exceeded, the total length becomes long and the size becomes large.
  • the distance between the first front group center axis Cf1 and the second front group center axis Cf2 is 1.2 mm or less.
  • the shortest distance that humans can stereoscopically observe is about 30 cm. If the distance is shorter than this, it is difficult to adjust the eyeball, and the focus cannot be achieved. Assuming that the eye width is 6 cm, the convergence angle is 6 °. When viewing at a convergence angle of 6 ° or more, it feels like a miniature model due to its constancy of size, or it feels strange as if it were a giant.
  • the optical axis interval and object point distance of both eyes are determined by the convergence angle.
  • the optical axis interval is 2 mm
  • the optical axis interval is 1.2 mm. That is, in order to enlarge and observe an object point distance as close as 6 mm, it is necessary to have an optical axis interval of 1.2 mm at a convergence angle of 6 ° or less.
  • Examples 1 to 3 of the stereoscopic imaging optical system 1 according to this embodiment will be described below.
  • the numerical data of Examples 1 to 3 will be described later.
  • FIG. 4 is a cross-sectional view of a plane including the first front group center axis Cf1 and the second front group center axis Cf2 of the stereoscopic imaging optical system 1 according to the first embodiment.
  • FIG. 5 is a cross-sectional view of the surface including the rear group center axis Cb orthogonal to the surface including the first front group center axis Cf1 and the second front group center axis Cf2 of the stereoscopic imaging optical system 1 according to the first embodiment.
  • . 6 is a lateral aberration diagram of the stereoscopic imaging optical system 1 according to Example 1.
  • FIG. FIG. 7 is a lateral aberration diagram of the stereoscopic imaging optical system 1 according to Example 1.
  • the angle shown in the center indicates (vertical angle of view), and indicates lateral aberration in the Y direction (meridional direction) and X direction (sagittal direction) at that angle of view.
  • a negative angle of view means a clockwise angle facing the positive direction of the X axis. The same applies to the lateral aberration diagrams of Examples 1 to 3.
  • the stereoscopic imaging optical system 1 includes, in order from the object side to the image side, the first front group Gf1 having the first front group center axis Cf1 and the first front group center axis.
  • a front group Gf having a second front group Gf2 having a second front group center axis Cf2 arranged in parallel with Cf1 and a rear group Gb having a single rear group center axis Cb are provided.
  • the first front group Gf1 includes a plano-concave negative lens Lf1 11 having a plane facing the object side.
  • the second front lens group Gf2 has a plano-concave negative lens Lf2 11 that is planar to the object side.
  • the first front group Gf1 and the second front group Gf2 are preferably formed integrally with the same shape.
  • Rear group Gb includes a cemented lens SUB1 1 of the biconcave negative lens Lb1 11 and a biconvex positive lens Lb1 12, and, as a group Gb1 after having biconvex positive lens Lb1 21, a negative meniscus lens having a convex surface directed toward the object side Lb2 11 a cemented lens SUB2 1 of the biconvex positive lens Lb2 12, and a second group Gb2 after having a biconvex positive lens Lb2 21 cemented lens SUB2 2 of the biconcave negative lens Lb2 22, after one group Gb1 and after 2
  • the first opening S1 centered on the first opening center CS1 deflected with respect to the rear group center axis Cb between the groups Gb2 and the plane including the first front group center axis Cf1 and the second front group center axis Cf2
  • the second opening S2 centered on the second opening center CS2 disposed
  • the first opening S1 and the first deflection group Gv1 are disposed adjacent to each other, and the second opening S2 and the second deflection group Gv2 are disposed adjacent to each other.
  • the first opening S1 is disposed on the object side of the first deflection group Gv1
  • the second opening S2 is disposed on the object side of the second deflection group Gv2.
  • the first deflection group Gv1 and the second deflection group Gv2 of Example 1 are formed of wedge prism-shaped optical elements whose thickness increases in the direction of the rear group central axis Cb as the distance from the rear group central axis Cb increases. Further, the wedge prism-shaped optical elements forming the first deflection group Gv1 and the second deflection group Gv2 of the first embodiment are integrally formed.
  • the optical element according to the first exemplary embodiment is formed of a plane that is orthogonal to the rear group central axis Cb on the object side and a plane that is inclined with respect to the rear group central axis Cb on the image side.
  • a filter F and a cover glass CG are disposed in front of the image plane I.
  • the first light beam L1 incident from the first object surface, not shown in the first front group Gf1 of the front group Gf is emitted from the first front group Gf1 through a plano-concave negative lens Lf1 11, enters the rear group Gb .
  • the first light beam L1 incident on the rear first group Gb1 of the rear group Gb passes through the cemented lens SUb1 1 and the biconvex positive lens Lb1 21 , exits the rear first group Gb1, and passes through the first opening S1.
  • the first light beam L1 that has passed through the first opening S1 passes through the first deflection group Gv1 and enters the rear second group Gb2.
  • the first light beam L1 incident on the rear second group Gb2 passes through the cemented lens SUb2 1 and the cemented lens SUb2 2 and exits the rear second group Gb2, and reaches the image plane I through the filter F and the cover glass CG. To do.
  • the second light flux L2 which is incident from the second object surface (not shown) to the second front lens group Gf2 of the front group Gf is emitted from the second front lens group Gf2 through a plano-concave negative lens Lf2 11, enters the rear group Gb .
  • the second light beam L2 incident on the rear first group Gb1 of the rear group Gb passes through the cemented lens SUb1 1 and the biconvex positive lens Lb1 21 , exits the rear first group Gb1, and passes through the second opening S2.
  • the second light beam L2 having passed through the second opening S2 passes through the second deflection group Gv2 and enters the rear second group Gb2.
  • the second light beam L2 incident on the rear second group Gb2 passes through the cemented lens SUb2 1 and the cemented lens SUb2 2 and exits the rear second group Gb2, and reaches the image plane I through the filter F and the cover glass CG. To do.
  • FIG. 8 is a cross-sectional view of a surface including the first front group central axis Cf1 and the second front group central axis Cf2 of the stereoscopic imaging optical system 1 according to the second embodiment.
  • FIG. 9 is a cross-sectional view of the surface including the rear group center axis Cb orthogonal to the surface including the first front group center axis Cf1 and the second front group center axis Cf2 of the stereoscopic imaging optical system 1 according to the second embodiment.
  • . 10 is a lateral aberration diagram of the stereoscopic imaging optical system 1 according to Example 2.
  • FIG. FIG. 11 is a lateral aberration diagram of the stereoscopic imaging optical system 1 according to Example 2.
  • FIG. 10 is a lateral aberration diagram of the stereoscopic imaging optical system 1 according to Example 2.
  • the stereoscopic imaging optical system 1 includes, in order from the object side to the image side, a first front group Gf1 having a first front group center axis Cf1, and a first front group center axis.
  • a front group Gf having a second front group Gf2 having a second front group center axis Cf2 arranged in parallel with Cf1 and a rear group Gb having a single rear group center axis Cb are provided.
  • the first front group Gf1 includes a plano-concave negative lens Lf1 11 having a plane facing the object side.
  • the second front lens group Gf2 has a plano-concave negative lens Lf2 11 that is planar to the object side.
  • the first front group Gf1 and the second front group Gf2 are preferably formed integrally with the same shape.
  • Rear group Gb includes a cemented lens SUB1 1 of the biconcave negative lens Lb1 11 and a biconvex positive lens Lb1 12, and, as a group Gb1 after having biconvex positive lens Lb1 21, a negative meniscus lens having a convex surface directed toward the object side Lb2 11 a cemented lens SUB2 1 of the biconvex positive lens Lb2 12, and a second group Gb2 after having cemented lens SUB2 2 of the biconvex positive lens Lb2 21 and the image plane I negative meniscus lens having a convex surface directed toward the side Lb2 22
  • the first deflection group Gv1 disposed between the rear first group Gb1 and the rear second group Gb2, and the rear group central axis Cb perpendicular to the plane including the first front group central axis Cf1 and the second front group central axis Cf2.
  • the second deflection group Gv2 arranged in plane symmetry with the first deflection group Gv1, and the rear group central axis Cb deflected between the rear first group Gb1 and the rear second group Gb2.
  • a first opening S1 centered on one opening center CS1;
  • a second opening center CS2 that is orthogonal to the plane that includes the front group center axis Cf1 and the second front group center axis Cf2 and that is symmetrical to the first opening center CS1 with respect to the plane that includes the rear group center axis Cb.
  • the first opening S1 and the first deflection group Gv1 are disposed adjacent to each other, and the second opening S2 and the second deflection group Gv2 are disposed adjacent to each other.
  • the first opening S1 is disposed on the image plane side of the first deflection group Gv1
  • the second opening S2 is disposed on the image plane side of the second deflection group Gv2.
  • the first deflection group Gv1 and the second deflection group Gv2 of Example 2 are formed of wedge prism-shaped optical elements whose thickness increases in the direction of the rear group center axis Cb as the distance from the rear group center axis Cb increases. Further, the wedge prism-shaped optical elements forming the first deflection group Gv1 and the second deflection group Gv2 of Embodiment 2 are integrally formed.
  • the optical element of Example 2 is formed of a plane that is orthogonal to the rear group center axis Cb on the object side and a plane that is inclined with respect to the rear group center axis Cb on the image side.
  • a filter F and a cover glass CG are disposed in front of the image plane I.
  • the first light beam L1 incident from the first object surface, not shown in the first front group Gf1 of the front group Gf is emitted from the first front group Gf1 through a plano-concave negative lens Lf1 11, enters the rear group Gb .
  • the first light beam L1 incident on the rear first group Gb1 of the rear group Gb passes through the cemented lens SUb1 1 and the biconvex positive lens Lb1 21 , exits the rear first group Gb1, and passes through the first deflection group Gv1.
  • the first light beam L1 that has passed through the first deflection group Gv1 passes through the first opening S1 and enters the rear second group Gb2.
  • the first light beam L1 incident on the rear second group Gb2 passes through the cemented lens SUb2 1 and the cemented lens SUb2 2 and exits the rear second group Gb2, and reaches the image plane I through the filter F and the cover glass CG. To do.
  • the second light flux L2 which is incident from the second object surface (not shown) to the second front lens group Gf2 of the front group Gf is emitted from the second front lens group Gf2 through a plano-concave negative lens Lf2 11, enters the rear group Gb .
  • the second light beam L2 incident on the rear first group Gb1 after the rear group Gb passes through the cemented lens SUb1 1 and the biconvex positive lens Lb1 21 to exit the rear first group Gb1 and passes through the second deflection group Gv2.
  • the second light beam L2 that has passed through the second deflection group Gv2 passes through the second opening S2, and enters the rear second group Gb2.
  • the second light beam L2 incident on the rear second group Gb2 passes through the cemented lens SUb2 1 and the cemented lens SUb2 2 and exits the rear second group Gb2, and reaches the image plane I through the filter F and the cover glass CG. To do.
  • FIG. 12 is a cross-sectional view of a plane including the first front group central axis Cf1 and the second front group central axis Cf2 of the stereoscopic imaging optical system 1 according to the third embodiment.
  • FIG. 13 is a cross-sectional view of the surface including the rear group center axis Cb orthogonal to the surface including the first front group center axis Cf1 and the second front group center axis Cf2 of the stereoscopic imaging optical system 1 according to the third embodiment.
  • . 14 is a lateral aberration diagram of the stereoscopic imaging optical system 1 according to Example 3.
  • FIG. FIG. 15 is a lateral aberration diagram of the stereoscopic imaging optical system 1 according to Example 3.
  • the stereoscopic imaging optical system 1 includes a first front group Gf1 having a first front group center axis Cf1 and a first front group center axis in order from the object side to the image side.
  • a front group Gf having a second front group Gf2 having a second front group center axis Cf2 arranged in parallel with Cf1 and a rear group Gb having a single rear group center axis Cb are provided.
  • the first front group Gf1 includes a plano-concave negative lens Lf1 11 having a plane facing the object side.
  • the second front lens group Gf2 has a plano-concave negative lens Lf2 11 that is planar to the object side.
  • the first front group Gf1 and the second front group Gf2 are preferably formed integrally with the same shape.
  • the rear group Gb includes a negative meniscus lens Lb1 11 having a convex surface directed toward the image plane I, a cemented lens SUb1 1 of a biconcave negative lens Lb1 12 and a biconvex positive lens Lb1 13 , and a negative meniscus having a convex surface directed toward the object side.
  • the first opening center CS1 is perpendicular to the plane including the first opening S1 as the center and the first front group center axis Cf1 and the second front group center axis Cf2 and includes the rear group center axis Cb.
  • Second opening arranged in plane symmetry A second opening S2 centered on the center CS2, a first deflection group Gv1 disposed between the rear first group Gb1 and the rear second group Gb2, a first front group center axis Cf1 and a second front group center axis Cf2
  • the first deflection group Gv1 and the second deflection group Gv2 are arranged symmetrically with respect to the plane that is orthogonal to the plane that includes the rear group central axis Cb.
  • the first opening S1 and the first deflection group Gv1 are disposed adjacent to each other, and the second opening S2 and the second deflection group Gv2 are disposed adjacent to each other.
  • the first opening S1 is disposed on the object side of the first deflection group Gv1
  • the second opening S2 is disposed on the object side of the second deflection group Gv2.
  • the first deflection group Gv1 and the second deflection group Gv2 of Example 3 are formed of wedge prism-shaped optical elements whose thickness in the rear group center axis Cb direction increases as the distance from the rear group center axis Cb increases. Further, the wedge prism-shaped optical elements forming the first deflection group Gv1 and the second deflection group Gv2 of the third embodiment are integrally formed.
  • the optical element of Example 3 is formed by a plane in which both the object side and the image plane side are inclined with respect to the rear group central axis Cb.
  • a filter F and a cover glass CG are disposed in front of the image plane I.
  • the first light beam L1 incident from the first object surface, not shown in the first front group Gf1 of the front group Gf is emitted from the first front group Gf1 through a plano-concave negative lens Lf1 11, enters the rear group Gb .
  • the first light beam L1 incident on a group Gb1 after the rear group Gb includes a cemented lens SUB1 1, and the first group Gb1 emitted after passing through the cemented lens SUB1 2, passing through the first opening S1.
  • the first light beam L1 that has passed through the first opening S1 passes through the first deflection group Gv1 and enters the rear second group Gb2.
  • the first light beam L1 incident on the rear second group Gb2 passes through the cemented lens SUb2 1 and the positive meniscus lens Lb2 21 and exits the rear second group Gb2, passes through the filter F and the cover glass CG, and enters the image plane I. To reach.
  • the second light flux L2 which is incident from the second object surface (not shown) to the second front lens group Gf2 of the front group Gf is emitted from the second front lens group Gf2 through a plano-concave negative lens Lf2 11, enters the rear group Gb .
  • the second light beam L2 incident on the rear first group Gb1 of the rear group Gb passes through the cemented lens SUb1 1 and the cemented lens SUb1 2 and exits the rear first group Gb1 and passes through the second opening S2.
  • the second light beam L2 having passed through the second opening S2 passes through the second deflection group Gv2 and enters the rear second group Gb2.
  • the second light beam L2 incident on the rear second group Gb2 passes through the cemented lens SUb2 1 and the positive meniscus lens Lb2 21 and exits the rear second group Gb2, passes through the filter F and the cover glass CG, and enters the image plane I. To reach.
  • the following shows the configuration parameters of the first to third embodiments.
  • the coordinate system is defined for each surface.
  • the direction from the origin O of the coordinate system in which the surface is defined toward the image plane at each central axis is defined as the positive Z-axis direction.
  • the direction from the second front group center axis Cf2 to the first front group center axis Cf1 on the same plane is defined as the X-axis positive direction.
  • the positive Y-axis direction is defined by a right-handed coordinate system.
  • optical action surfaces constituting the three-dimensional imaging optical system 1 of each embodiment when a specific surface and a subsequent surface constitute a coaxial optical system, a surface interval is given.
  • the radius, the refractive index of the medium, and the Abbe number are given according to conventional methods.
  • the amount of eccentricity from the origin O of the coordinate system in which the surface is defined (X-axis direction, Y-axis direction, and Z-axis direction are X, Y, Z, respectively) and the coordinate system defined by the origin O
  • the tilt angles ( ⁇ , ⁇ , ⁇ (°), respectively) of the coordinate system defining each surface centered on the X axis, the Y axis, and the Z axis are given.
  • positive ⁇ and ⁇ mean counterclockwise rotation with respect to the positive direction of each axis
  • positive ⁇ means clockwise rotation with respect to the positive direction of the Z axis.
  • the ⁇ , ⁇ , and ⁇ rotations of the central axis of the surface are performed by rotating the coordinate system defining each surface counterclockwise around the X axis of the coordinate system defined at the origin of the optical system. Then rotate it around the Y axis of the new rotated coordinate system by ⁇ and then rotate it around the Z axis of another rotated new coordinate system by ⁇ . It is.
  • Refractive index and Abbe number are shown for d-line (wavelength 587.56 nm).
  • the unit of length is mm.
  • the eccentricity of each surface is expressed by the amount of eccentricity from the reference surface. “ ⁇ ” described in the radius of curvature indicates infinite.
  • the aspheric data used in this embodiment shows data related to an aspheric lens surface in the surface data.
  • the aspherical shape is expressed by the following formula (a), where z is an optical axis with the light traveling direction being positive, and y is a direction orthogonal to the optical axis.
  • z (y 2 / r) / [1+ ⁇ 1 ⁇ (1 + K) ⁇ (y / r) 2 ⁇ 1/2 ] + A4y 4 + A6y 6 + A8y 8 + A10y 10 ... (a)
  • r is a paraxial radius of curvature
  • K is a conical coefficient
  • A4, A6, and A8 are fourth-order, sixth-order, and eighth-order aspheric coefficients, respectively.
  • the symbol “e” indicates that the subsequent numerical value is a power exponent with 10 as the base. For example, “1.0e-5” means “1.0 ⁇ 10 ⁇ 5 ”.
  • Example 1 Surface number Curvature radius Surface spacing Eccentricity Refractive index Abbe number Object surface ⁇ 5.000 1 ⁇ 0.400 1.8830 40.7 2 Aspherical surface [1] 0.400 3 ⁇ (virtual surface) 0.000 Eccentricity (1) 4 -12.178 0.500 1.8830 40.7 5 1.935 1.200 1.7847 25.7 6 -2.622 0.050 7 5.891 0.700 1.8830 40.7 8 -5.975 0.301 9 Diaphragm surface 0.050 Eccentricity (2) 10 ⁇ 0.400 Eccentricity (2) 1.6477 33.8 11 ⁇ 0.150 Eccentricity (3) 12 14.172 0.400 1.9229 18.9 13 1.800 1.500 1.6516 58.5 14 -2.747 0.207 15 1.987 1.300 1.8830 40.7 16 -2.004 0.400 1.9229 18.9 17 57.910 0.129 18 ⁇ 0.400 1.5163 64.1 19 ⁇ 0.400 1.5163 64.1 20 ⁇ 0.000 Image plane ⁇ Aspherical [1] Curvature radius 0.536 k -7
  • Example 1 Example 2
  • Example 3 Element d 2.13 2.41 2.45
  • Conditional expression (1) Lb / f 4.17 4.15 4.46
  • FIG. 16 is a diagram schematically illustrating an example in which the stereoscopic imaging optical system 1 according to the present embodiment is used as the stereoscopic imaging apparatus 10.
  • the stereoscopic imaging apparatus 10 of the present embodiment includes a stereoscopic imaging optical system 1 and an imaging element 11.
  • the imaging element 11 is disposed on the image plane I of the stereoscopic imaging optical system 1.
  • the light beam that has passed through the stereoscopic imaging optical system 1 forms an image on the imaging element 1. Therefore, it is possible to accurately perform stereoscopic imaging.
  • the stereoscopic imaging apparatus 10 of the present embodiment may include a lenticular lens 12 on the object side of the imaging element 11. By providing the lenticular lens 12, stereoscopic imaging can be performed more accurately.
  • FIG. 17 is a diagram illustrating an example in which the stereoscopic imaging optical system 1 of the present embodiment is used as the stereoscopic imaging optical system 1 at the distal end of the endoscope.
  • FIG. 17 is a diagram for illustrating an example in which the stereoscopic imaging optical system 1 according to the present embodiment is used as the stereoscopic imaging optical system 1 at the distal end of the endoscope 110.
  • FIG. 17A is an example in which the stereoscopic imaging optical system 1 according to the present embodiment is attached to the distal end of the rigid endoscope 110 and 360 ° omnidirectional images are captured and observed stereoscopically.
  • FIG. 17B shows a schematic configuration of the tip.
  • the optical system 1 according to the present embodiment is similarly attached to the distal end of the flexible electronic endoscope 113, and the captured image is subjected to image processing on the display device 114 to correct distortion and stereoscopically. This is an example of displaying.
  • the stereoscopic imaging optical system 1 of the present embodiment for the endoscope 113, it is possible to capture and observe images in all directions in a stereoscopic manner, and from various angles different from the conventional one.
  • the site can be imaged and observed three-dimensionally.

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DE112015001381.4T DE112015001381B4 (de) 2014-04-24 2015-01-28 Stereoskopisches optisches Abbildungssystem, stereoskopisches Abbildungsgerät und Endoskop
CN201580020494.2A CN106233182B (zh) 2014-04-24 2015-01-28 立体摄像用光学系统、立体摄像装置以及内窥镜
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Families Citing this family (5)

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JP6280749B2 (ja) * 2013-01-23 2018-02-14 オリンパス株式会社 光学系、立体撮像装置、及び内視鏡
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JP6713019B2 (ja) * 2018-06-05 2020-06-24 富士フイルム株式会社 撮像レンズ及び撮像装置
CN108803001A (zh) * 2018-06-14 2018-11-13 珠海康弘发展有限公司 一种兼容二维内窥镜的三维内窥镜系统以及内窥镜成像系统
CN109407277B (zh) * 2018-12-06 2024-04-23 浙江舜宇光学有限公司 光学成像系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08122665A (ja) * 1994-10-27 1996-05-17 Olympus Optical Co Ltd 立体視内視鏡
JPH116967A (ja) * 1997-06-13 1999-01-12 Fuji Photo Optical Co Ltd 立体視内視鏡
JP2001147382A (ja) * 1999-11-19 2001-05-29 Olympus Optical Co Ltd 内視鏡用対物光学系
JP2003005096A (ja) * 2001-06-27 2003-01-08 Olympus Optical Co Ltd 内視鏡装置
JP2010128354A (ja) * 2008-11-28 2010-06-10 Olympus Medical Systems Corp ステレオ光学系、並びにそれを用いたステレオ計測用光学装置、ステレオ計測装置及びステレオ観察装置
JP2013218239A (ja) * 2012-04-12 2013-10-24 Olympus Medical Systems Corp 立体撮像光学系及びそれを備えた内視鏡
JP2014021293A (ja) * 2012-07-19 2014-02-03 Olympus Medical Systems Corp 偏向光学系及びそれを備えた内視鏡

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07122692B2 (ja) * 1988-09-29 1995-12-25 富士写真光機株式会社 内視鏡用対物レンズ
US5459605A (en) * 1992-12-17 1995-10-17 Paul S. Kempf 3-D endoscope apparatus
US5976071A (en) * 1994-11-29 1999-11-02 Asahi Kogaku Kogyo Kabushiki Kaisha Stereoscopic endoscope
US6104426A (en) * 1996-03-23 2000-08-15 Street; Graham S. B. Stereo-endoscope
DE10027166B4 (de) * 1999-05-31 2007-03-08 Pentax Corp. Stereoskopmikroskop
US6682478B2 (en) * 2001-02-08 2004-01-27 Olympus Optical Co., Ltd. Endoscope apparatus with an insertion part having a small outer diameter which includes and object optical system
US7170677B1 (en) * 2002-01-25 2007-01-30 Everest Vit Stereo-measurement borescope with 3-D viewing
KR100817881B1 (ko) * 2006-03-06 2008-03-31 진 호 정 입체 영상 촬영 렌즈계
ES2296537B1 (es) * 2006-10-05 2009-07-24 Gema Active Business Solutions, S.L. Sistema para el inventario y localizacion de objetos.
IL188169A (en) * 2006-12-18 2011-06-30 Visionsense Ltd High resolution endoscope
US8107170B2 (en) * 2008-11-19 2012-01-31 Olympus Corporation Objective optical system
JP5253126B2 (ja) * 2008-12-12 2013-07-31 日東光学株式会社 レンズシステムおよび表示装置
US20140296866A1 (en) * 2009-06-18 2014-10-02 Endochoice, Inc. Multiple Viewing Elements Endoscope Having Two Front Service Channels
CN102597871B (zh) * 2009-10-23 2014-12-31 奥林巴斯医疗株式会社 立体摄影用对物光学系统以及内窥镜
US20130170029A1 (en) * 2010-08-06 2013-07-04 Panasonic Corporation Lens unit
US8373408B2 (en) * 2011-02-22 2013-02-12 Sendyne Corporation High precision algorithmically assisted voltage divider with fault detection
EP2755544B1 (de) * 2011-09-13 2019-12-25 Visionsense Ltd Proximales hochauflösendes endoskop
WO2013108500A1 (ja) * 2012-01-18 2013-07-25 オリンパスメディカルシステムズ株式会社 立体視内視鏡用光学系
US20160004065A1 (en) * 2013-02-19 2016-01-07 Integrated Medical Systems International, Inc. Endoscope with Pupil Expander
US9565421B2 (en) * 2014-11-25 2017-02-07 Harold O. Hosea Device for creating and enhancing three-dimensional image effects
IL236418A (en) * 2014-12-23 2016-07-31 Visionsense Ltd Stereo endoscope with tiltable, rotatable view

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08122665A (ja) * 1994-10-27 1996-05-17 Olympus Optical Co Ltd 立体視内視鏡
JPH116967A (ja) * 1997-06-13 1999-01-12 Fuji Photo Optical Co Ltd 立体視内視鏡
JP2001147382A (ja) * 1999-11-19 2001-05-29 Olympus Optical Co Ltd 内視鏡用対物光学系
JP2003005096A (ja) * 2001-06-27 2003-01-08 Olympus Optical Co Ltd 内視鏡装置
JP2010128354A (ja) * 2008-11-28 2010-06-10 Olympus Medical Systems Corp ステレオ光学系、並びにそれを用いたステレオ計測用光学装置、ステレオ計測装置及びステレオ観察装置
JP2013218239A (ja) * 2012-04-12 2013-10-24 Olympus Medical Systems Corp 立体撮像光学系及びそれを備えた内視鏡
JP2014021293A (ja) * 2012-07-19 2014-02-03 Olympus Medical Systems Corp 偏向光学系及びそれを備えた内視鏡

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